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Development of a Phosphorus Index for Pastures Fertilized with Poultry Litter—Factors Affecting Phosphorus Runoff

Paul B. DeLaunea,*, Philip A. Moore, Jr.b, Dennis K. Carmanc, Andrew N. Sharpleyd, Brian E. Haggardb and Tommy C. Daniela

a Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72701
b USDA-ARS, Poultry Production and Product Safety Research Unit, Fayetteville, AR 72701
c USDA-NRCS, National Water Management Center, Little Rock, AR 72203
d USDA-ARS, Pasture Systems and Watershed Management Research Unit, University Park, PA 16802



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  		Fig. 1. Relationship between soluble reactive phosphorus (SRP) in runoff water and (a) Mehlich-III soil test P before litter application; (b) Mehlich-III soil test P after litter application; and (c) the amount of soluble P in litter applied.

 


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  		Fig. 2. The effect of diet type on soluble reactive phosphorus (SRP) concentrations in runoff water.

 


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  		Fig. 3. The effect of (a) alum application rate; (b) fertilizer type; and (c) poultry litter application rate on soluble reactive phosphorus (SRP) concentrations in runoff water. TSP, triple superphosphate.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2004 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.